TLS Online TPP Program

#Question id: 1246


An SH2-containing protein contains a mutation that changes its binding pocket such that tyrosine and phosphotyrosine bind with equal affinity. As a result, MEK activity:

#XL - Q Biochemistry
  1. decreases due to changes in Raf activation.

  2. decreases due to allosteric inhibition of SH2-domain binding.

  3. increases with ligand binding-induced dimerization.

  4. does not change with receptor dimerization and transautophosphorylation.

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TLS Online TPP Program

#Question id: 5240

#XL - S Microbiology

If bacteria grow in the presence of a large amount of DNase, which of the following recombination process completely inhibited?

TLS Online TPP Program

#Question id: 5240

#XL - T Zoology

If bacteria grow in the presence of a large amount of DNase, which of the following recombination process completely inhibited?

TLS Online TPP Program

#Question id: 5241

#XL - S Microbiology

Genes a, b, and c are widely spaced in the bacterial genome. Transducing phage from an a+ b+ c+ bacterium were used to infect a culture of a- b- c- cells, and b+ transductants were selected. Which of the following best describes the predicted genotypes of these transductants?

TLS Online TPP Program

#Question id: 5241

#XL - T Zoology

Genes a, b, and c are widely spaced in the bacterial genome. Transducing phage from an a+ b+ c+ bacterium were used to infect a culture of a- b- c- cells, and b+ transductants were selected. Which of the following best describes the predicted genotypes of these transductants?

TLS Online TPP Program

#Question id: 5242

#XL - S Microbiology

Auxotrohic bacteria plating on different medium, it is observed that colonies grow on minimal plus threonine only, no colony on minimal plus leucine and no colonies grow on minimal medium cystein only. What are the actual genotypes of auxotroph?

TLS Online TPP Program

#Question id: 5242

#XL - T Zoology

Auxotrohic bacteria plating on different medium, it is observed that colonies grow on minimal plus threonine only, no colony on minimal plus leucine and no colonies grow on minimal medium cystein only. What are the actual genotypes of auxotroph?